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AdministeringIn addition to administering the database server, you can tune performance, replicate data, and archive data.
System administrationThese topics contain concepts, procedures, and reference information for database and database server administrators to use for managing and tuning HCL OneDB™ database servers.
Administrator's GuideThe HCL OneDB™ Administrator's Guide provides the information required to administer HCL OneDB™.
Disk, memory, and process management
Shared memoryThese topics describe the content of database server shared memory, the factors that determine the sizes of shared-memory areas, and how data moves into and out of shared memory.
Resident portion of shared memoryThe operating system, as it switches between the processes that run on the system, normally swaps the contents of portions of memory to disk. When a portion of memory is designated as resident, however, it is not swapped to disk. Keeping frequently accessed data resident in memory improves performance because it reduces the number of disk I/O operations that would otherwise be required to access that data.
High-Availability Data-Replication bufferData replication requires two instances of the database server, a primary instance and a secondary instance, running on two computers.

High-Availability Data-Replication buffer

Data replication requires two instances of the database server, a primary instance and a secondary instance, running on two computers.

If you implement data replication for your database server, the primary database server holds logical-log records in the data replication buffers before it sends them to the secondary database server. A data replication buffer is always the same size as the logical-log buffer. For information about the size of the logical-log buffer, see the preceding topic, Logical-log buffer. For more information about how the data replication buffer is used, see How data replication works.

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